摘要
该文用扫描电镜(SEM)和透射电镜(TEM)观察了浙江、云南、吉林和广东等地四种硅藻土中硅藻壳体的形态构造、壳壁内部的细微结构和粘土杂质的形状。研究了上述四种硅藻土经不同浓度盐酸酸洗后或经高温焙烧后其结构的变化;X射线衍射表明.硅藻壳体经1150℃高温焙烧后,无定形二氧化硅转化为α-方石英。
This paper describes the structure and interior microstructure of the diatom frustules and the shapeof clay impurity in four kinds of diatomite from Zhejiang, Jilin, Yunnan and Guangdong throughSEM and TEM observations. The four kinds of diatomite were washed in hydrochloric acid of differentconcentrations or roasted, with different changes observed in their structure. Combined with X--raydiffraction, the composition of clay in the diatomite was found, and amorphous silica was transformedinto α--cristobalite after the diatom frustules had been roasted at 1150℃. A discussion is made on therelationship between the variety and variation in the structure of the diatom frustules, providinginformation for exploitation of the rich diatomite resource in China.
出处
《微体古生物学报》
CSCD
北大核心
1992年第3期319-326,347-350,共8页
Acta Micropalaeontologica Sinica
关键词
硅藻土
硅藻壳体
电子显微镜
diatomite
diatom frustules
structure
electron microscope
